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FAQ
LoRa and LoRaWAN technology principle and advantages and disadvantages
LoRa and LoRaWAN are currently very popular wireless communication technologies in the field of Internet of Things, LoRa is a physical layer technology, LoRaWAN is a communication protocol. They adopt low-power wideband wireless modulation technology, which can provide long distance communication service in long distance, low speed and low power.
Lorawan Energy Meter & Antennas
Lorawan energy meters are also known as:Lorawan electricity meter, lorawan power meter, Lorawan smart energy meter etc. LoRaWAN is a Media Access Control (MAC) layer protocol built on top of LoRa modulation. so we can say we build our Lorawan energy meter based on LoRa technology.
Frequency Band & LoRaWAN Meter
LoRaWAN specifies 10 regional parameter standards (LoRa node development - LoRaWAN parameter standards in different regions), but some countries or regions have more than one ISM band, so multiple regional parameter standards can be used in some countries or regions. The available frequency bands in some countries or regions are as follows:
MID & Eichrecht - compliance of EV chargers
Note that so-called 'PTB compliant' chargers actually comply with the German calibration law (Eichrecht). Eichrecht = compliance with MID + “customer protection”: the customer must be able to check charge session data hours/days/months after the actual session...
What is the difference between M-Bus and MODBUS communication ?
M-Bus Communication: M-Bus is a communication protocol used between meters and the central data collection system or Pre-Payment unit. Widely used on new projects where the building infrastructure can be designed accordingly.M-Bus is available on a wide variety of gas, heat, electricity, and cold/hot water meters.
What is Four Quadrant Metrology?
P—active energy; Q—reactive energy; QL—inductive reactive energy; QC—capacitive reactive energy; S—apparent power Forward active power: P=UICOSΦ, where the range of Φ is within ±90°. Reverse active power: P=UICOSΦ, where Φ ranges from 90° to 270° Forward reactive power: P= UISINΦ, where the range of Φ is within 0~180°...
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